Bushing and process of making same.



No. 840,165. PATENTED JAN. 1, 1907,

J. R. SIMPSON. BUSHING AND PROCESS OF MAKING SAME.

APPLIOATION FILED FEB. 9, 1906.

' 2 SHEETS-SHEET 1.

J.. R. SIMPSON.

BUSHING AND PROCESS OF MAKING SAME. APPLICATION FILED FEB. 9.1906.

2 SHEETS-SHEET 2 .PATENTED JAN. 1, 1907.-

zswi NITEnsTArns PATENT OFFICE.

'- JOHN R. SIMPSON, oE-TRoY, OHIO.

' Specification of Letters Patent. npplioation'filed February 9,1906. Seria1No.300.346.

USHIN AND PROCESS oF MAKING SAME.

'. porated in the structure, and the-method of making same, and is particularly adaptedfor "trollev-Wheels of tractionecars, but is not limited to such use. i

On account of the rough usage and exposure to dust and'grit to" which trolley-wheels are subjected it is highly deslrable, but has been found extremely difiicult, to provide proper lubrication forthe journal-bearings of the trolley-wheels, thereby necessitating the frequent replacement of the wheel or hear- The object of the present invention is to provide a simple and comparatively cheap interchangeable bushing which 'may be hi hly charged with graphite, grease, or

- ot er lubricant or antifriction'material and ing greatly to the which will retain said lubricant through a comparatively lo'nlglfperiod of time, thus add.

' e of the hearing.

A further object is to. provide-a simple and practical method of forming such a bushing. With the above primary and other incldental obj ects'in view the invention consists of'thedevice and parts 'or their equivalents and the method of construction hereinafter described, and set forth in the claims.

. bushing in place;- Fig.'2 is" an'end view of the forming mechanism by which the bushis constructed. Fig: 3 isa longitudinal In the drawings, Figure: 1 is a sectional view of atrolley-wheel with the-improved sectional view of the forming. mechanism;

4 is aview sho warp andwoof in the metallic fabric-before compression Fig; 5 shows'the relative arrangement of the .warp'and woofafter com pressio'n.. 6 iscanenlarged'detail view I of the formingoperation.

of a portion of the tube after the completion Referring by letter to the drawing-5,2; epresents thetrolley-wheel having a central bore in which is inserted a bus 'thearrangement of 'die. causes similarperipheral serrations ai'about hing compris-. I 5 5 a sleeve 11,, of comparatively thin walls, 1 which the serrations are formedonthe out as copper or 'some' softer grades of brass.

The piece of fabric employed is somewhat longer than the sleeve a and is cut bias, with the warp andwoof' at right angles to each other and at an an 1c of substantially fortyfive degrees with t e respective sides of the I strip, asin Flg. 4. Lubricant is thoroughly rubbed into/the meshes of the fabric, is thenwrapped a number of times about a mandrel b, as at b, Fig. 3. The mandrel b,

Patented Jan. 1, 1967..

anda portion a,.of'non-ab rasive metallic f fabric, highly charged with lubricant or antif frictional substance and compressed into. I 1 tubular form within the sleeve a.- 'Themel tallic fabric most preferable is an open-mesh fabric of "a' soft non-abrasive material, such surrounded with the fabric thus charged the whole placed in the three-part die b The three-part die is formed slightly tapering ,to correspond with the bore of a surrounding sleeve b The middle portion of the die If, at which is located the tube a when in proper position, is shghtly corriigated, as at ,,to produce slight peri heral serrations or corrugations on the exterlorof the tube a, as hereinafter described. Sleeves?) b are pro- .vided, whichconfine and guide the protruding ends of the metal fabric while it isbeing compressed. Hollow'plungerev b b surin the sleeves b bfibear upon the extended power press of any suitable construction,

and pressure is applied to the lungers b I) untilthe fabric is compresse to a le with lubricant, is inserted in the sleeve a. and

.ends' of the fabric. The-device; placed in a equal to that of theysleeve a. By removing the three-part die 6 from the sleeve 11 the completed bushing is easily discharged. The mandrel b defines the bore of' the'" finished bearing.-

' -When plungers met'allicffabricincident? to the'lateral com-:

ress'ureis. applied to the respective ,the-warp and wo'ofof the metal; H lic fabric-change their relative arrangement.

. and term a more; acute. angle with each other,

1 0 6 .'.as in Fig; The elongation of the-strip of" lutions "of fabric to increase diametrically I and expand the" tube a within the three-part The serrated interior .b f-of the -die the exterior surface of the tubea upon th expansion thereof. The pressure; "unde rounding the ends of the mandrel b and with v i side of the tube will give to the tube a acrenate interior'configuration, as shown in Fig. It has been found in practice that when partially compressed to the required degree the respective convolutions of fabric will expand diametrically and leave an intervening space between the inner layer of fabric and the mandrel b. The compression causes the lubricant to some extent to be squeezed out ofthe meshes of the fabric into the intervening space, which constitutes the bearing-surface of the finished bushings Upon further compression the respective convolutions of fabric will collapse or buckle into irregularconfiguration, which assists in retaining the lubricant inplace. The undulating or cre-,

' tine or alcohol is most desirable; but the innate interior of the tube a, formed as'hereinbefore mentioned, assists to retain the lubricant-charged fabric within the tube a, while the exterior serrations of the tube permit the irregular openings in the trolley-wheels and,

further, serve toretain the bushing in place.

Any suitable lubricant may be'employed; but it has been found in practice that raphite in a lastic condition or a mixture f irmed of graphite with resin or shellac and turpenvention is not limited to the use of such lutallic fabric are united in a'solid structure structed without the use facturing journal-bearin s which com rises bricant. It has further been found desirable to include in the lubricating mixture fine filings or subdivided particles of babbitt, so'l der, or other antifriction metal. After the com letion of the forming operation the finishe bushing is heated or. baked, which adds to the eflicienc of the bearing, bothras to lubricating ua ities and solidity of the com- ,pleted artic e, by partially carbonizing the binding material forthe lubricant, and, furor solder the respective convolutions "of me- It will be seen that the bushing thus constructed will be highly charged with lubri cant an possess eat wearing qualities and, furthenthatit is simple and easily conex ensive mechanism." I aving thus described my invention, clai m i 1. The herein-described method of menu employing a sleeve, a piece of metal abric longer than said sleeve rolled upon itself and inserted therein said fabric being 'reviously charged with a-fubrieant, and app 'n pressure to the protruding ends of said fa ric to compress said fabric to a length substantially equal to that of the sleeve.

'2. As an 'articleof manufacture, a journalbearing comprising a sleeve having corrugations on the extei'ior thereof,' a lining for said sleeve of metallic fabric arranged in convolute form and charged with lubricant.

3. As an article of manufacture, a journal- 'ther, by the fusing ofthe particles of babbitt of complicated or spective-convolutions of said fabric to collapse or buckle, substantially as s ecified.

lating or' crenate interior, a lining for said 7 sleeve of metallic fabric arranged in convolute form. and charged with lubricant.

4. As an article of manufacture, a j ournalbearing comprising a sleeve having corrugations onthe exterior thereof, and an undulating or crenate interior, a lining for said sleeve of metallic fabric arranged inconvolute form and charged with lubricant.

5. As an article of manufacture, a journalbearin comprising a sleeve, ,a'strip of.--metallic abric having the vwarp and woof respectively thereof arranged at an angle with t e respective edges of the strip, said strip of fabric being arranged in convolute form cant, substantially as specified.

bearing comprising a sleeve having corru ations on the exterior thereof, and an un ulating or crenate interior, a linin for said sleeve comprising a strip of meta lic fabric havin its warp and woof angularly arrange with the respective edges of the strip of fabric, said metallicfabric being charged '-'with lubricant, substantially as specified.

" 7. As an articleof manufacture, a journal sleeve consisting of a strip of metallic fabric in convolute form, the res ective convolutions of said fabric being coll apsed orbuckled, and. lubricant within said fabric, substantially asd'escribed,

p 8. The herein-described method of manufacturing journal-bearin s which com rises employin a sleeve,-a-stnp of metallic abric havin t e warp and Woof 'angularly arrange ,said iece of fabric being ofgreater dimensions t an the length of said tube, charging said. fabric'with lubricant, rolling saiddubribant-charged metallic fabrlc upon itself and inserting it within the sleeve, a

pl 'ng pressure to the projecting ends of said fa ric, whereby the fabric will be compressed within said sleeve causing said sleeve to expand inirregular outline and the re- 1 9. The herein-described metho .of manufacturing journal-bearings which comprises employing a sleeve, a stri of metallic fabric, charging said fabric with a mixture comprising jaflubric'ant, and a binder therefor, said mi x'ture also containing. particles of antifriction lying pressure the respective convolutions of the metallic fabric; substantilalyas specified.

6. As an article of manufacture, a journalbearing comprising a sleeve, a linin for said;

abric, whereby within said sleeve and charged with lubri- Jmetal, rolling the'said lubricantcharged metallic fabric upon itself, and int e particles 10. As an article of manufacture,a j ournal- In testimony whereof I have hereunto set bearing comprising a sleeve, a piece of memy hand this22d day of January, A. D. IO tallic fabric lnconvolute form, a lubricating 1906. I mixture comprising a lubricant with binding v 5 material within the meshes and convolutions Y of said fabric, the respective convolutions 'Witnesses: of the fabric being united by particles of CHAS. I. WELCH, M non-abrasivemetal,substantiallyasspecified. I OLAnA GALLAGHER.

JOHN; R. SIMPSON.- 

